URL-decode CSV
Quickly decode CSV from URL-encoding. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use URL-decode CSV
- 1. Paste the percent-encoded string. Drop the encoded payload into the input pane, straight from a query parameter, a form body or a server access log. Sequences like %2C and %0A are turned back into commas and newlines.
- 2. Handle plus signs correctly. If the data came from a form post or a query string that used the + convention for spaces, enable 'Treat + as space'. Leave it off when literal plus characters belong in the data.
- 3. Copy the recovered CSV. Copy the decoded rows and inspect or reuse them. If a value still shows stray %25 sequences, the source was encoded twice, so run the output through the decoder one more time.
When to use URL-decode CSV
URL-decode CSV unpacks table data that arrived percent-encoded. Anything that traveled through a query string, a form submission or a webhook body tends to come out full of %2C, %0A and plus signs. This tool restores the readable rows so you can see what a client actually sent.
- Reading a payload from server logs. An access log captured the body of a failed form post as one encoded string. Decode it here to see the actual rows the user submitted and find the malformed line.
- Debugging a webhook in the network tab. The browser's network inspector shows the request payload URL-encoded. Paste it in, flip 'Treat + as space' on, and compare the decoded CSV against what your handler expected to parse.
- Recovering data from a shared link. A colleague sent a link with table contents packed into a parameter. Decoding the parameter gives you the underlying CSV to edit and re-encode rather than reconstructing it by hand.
Examples
Decode percent-encoded CSV
Input
name%2Cage%0AAda%2C36
Output
name,age Ada,36
About the URL-decode CSV tool
URL-decode CSV does its work locally, right in the browser. Quickly decode CSV from URL-encoding. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the CSV Tools collection on EditSafely, a set of 133 small, focused CSV utilities that share the same instant, private workspace.
You can shape the output with the Treat + as space setting, and the result refreshes the moment you change it. A worked example further down the page shows exactly what the tool produces for a real input.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Does URL-decode CSV cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.